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Plumbing & Plumbers Forum - Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?
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Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

Discuss Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all? at UK Plumbers Forums; To cut a long story short, I started reading the the WRAS Water Regs book again: G16.1 d states that a G1/2 size valve (do they mean a 1/2" valve ...
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    Default Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

    To cut a long story short, I started reading the the WRAS Water Regs book again:

    G16.1 d states that a G1/2 size valve (do they mean a 1/2" valve as opposed to, say, a 3/4" valve?) must be 'constructed so that the water shut-off level may be altered [...] without bending the float lever.' So why bother making Part 1 valves of that size at all?

    I suppose you could argue that replacing a valve does not constitute installing one so you can fit a non-compliant valve as a replacement? Is that why these are still sold?

    Just wondering as usual

    Thanks,

    Ric
    Last edited by Ric2013; 31-12-2015 at 12:45 AM. Reason: Post was barely literate

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    Default Re: Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

    yep. They can be replaced but why on earth would anyone bother. Just use a part two.
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    Default Re: Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

    They were out of date in 1962, so I have no idea either. Still finding loads of them in service though.

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    Default Re: Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

    I changed one yesterday funnily enough.

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    Default Re: Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

    Part 2's are only made in G1/2 & 3/4 sizes so if you want anything bigger it is still the Part 1.

    Also Part 2 is limited to the orifice size that can be fitted I seem to remember.
    Nolite id cogere, cape malleum majorem

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    Default Re: Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

    That's my point: specifically, why bother making the half inch? What does the G stand for, by the way?

    R

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    Default Re: Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

    Nolite id cogere, cape malleum majorem

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    Default Re: Any reason 1/2" Portsmouth (Part 1 ballcocks or FOV) are still sold at all?

    Many existing WC cisterns still in use have a Portsmouth float operated valve (part1), when the valve is in need of replacement the use of a part2 will not fit due to its air gap back flow protection of the water outlet at the top by means of the bent plastic water delivery spout sticks up too high for the cistern lid. The part 1 can be installed providing back flow protection is installed in the supply pipe in line with The Water Supply (Water Fittings) Regulations 1999.
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